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C++ cstring memcpy() function

❮ CString Functions

Example

Copy data from one array to another:

int myNumbers[5] = {10, 20, 30, 40, 50};
int myCopy[5];
memcpy(myCopy, myNumbers, sizeof(myNumbers));
for (int i = 0; i < 5; i++) {
  cout << myNumbers[i] << " " << myCopy[i] << "\n";
}
Try it Yourself »

Definition and Usage

The memcpy() function copies data from one block of memory to another.

The memcpy() function is defined in the <cstring> header file.

Note: The memcpy() function is generalized for memory of any type. When working with C-style strings (char arrays) it is better to use the strcpy() function instead.

Syntax

memcpy(void * destination, void * source, size_t size);

The size_t data type is a positive integer.

Parameter Values

Parameter Description
destination Required. A pointer to the block of memory to be copied to.
source Required. A pointer to the block of memory being copied.
size Required. The amount of data to copy measured in bytes.

Technical Details

Returns: A void type pointer to the destination.

❮ CString Functions